I think that she planned to kill him in the shower all along so as to make the least mess. I think that she knew that TA would probably take a shower after their all day sex-romp (as I'm sure he had done in the past & she betted on him taking a shower on 6/4) -then- all she had to do was make up an excuse to be in the bathroom with him during his shower and this was done with JA's ridiculous idea to take that stupid "shower photo shoot of TA". I think that her plan was to get him into a place that he couldn't escape or call for help easily and a place that would help keep the bloody mess that she would cause by killing TA to a minimum. I believe that JA (foolishly) thought that one stab direct to TA's heart would have been enough to kill him instantly & drop him on spot (ae: in the running shower) -or- if you are of those who believe she shot him first then JA would have foolishly believed that one shot to TA's head would kill him instantly, on spot (this most likely would have been when she was having TA sit down in the shower to pose for the pics of her staged photo shoot). What JA did NOT plan to happen (nor do I think it ever occurred to her) was the fact of how hard it can be to kill a human being; the bloody struggle that can sometimes happen in murder... JA never intended TA to leave that shower IMO, thus we have all of the crazed wounds all over TA and overkill because she had not planned on him surviving her first (and what she thought would be only fatal) blow. TA's wounds, to me, show a killer who was not only full of rage but also they show a killer who was in a frenzy and extremely panicked. TA already survived what JA thought for sure would be a fatal blow/attack (with that first injury that JA inflicted upon him) so I'm sure that JA panicked as this was not how she planned it (and we all know what a great planner/calculator she is). And when TA not only survived that first attack but he also made it OUT of that shower, JA was going to do everything in her power to make sure that TA was not able to take the next step of getting/calling for help, and she did just that; whatever the painful & tortuous cost to TA as well as however much more of a mess that doing so would make. I also think that JA did doubt her ability (as well as the ability of the weapons that she was able to gather/bring with her [ae: a small caliber gun and/or knife]) to deliver a single fatal blow to TA because she brought two weapons with her into that bathroom (if the one that she chose to be her initial deadly weapon of choice did not do the job right away then the other was backup). Dragging TA back into the shower further makes me believe that this is where she wanted him to lay dead all along (plus getting him back to the shower would help wash her blood/DNA off his body that TA would have surely had on him at the time of his death). The best thing is the irony & karma in it all where the very camera that JA used to help perpetrate her murder was the same camera that miraculously kept snapping unintentional -yet crucial- photos that have shown the world both WHO was responsible for TA's grisly murder as well as what a monster that JA really is...
But this is JMO, of course, but I strongly believe most -if not all of what I typed- is the closest to what the reality/truth really was on 6/4/08... Just sharing so as to put out there another perspective/possibility.
*Another reason that I believe that JA's little shower photo op was entirely staged for the purpose of giving her the best advantage of murdering TA w/o being caught is that she immediately deleted ALL of the photos off that camera and then carelessly/foolishly threw it in the washer. C'mon now guys & gals, we all know JA keeps EVERYTHING and ANYTHING that she ever had that dealt with TA. She kept miticulous photographic & written records of everything that he ever gave her and every single thing that they EVER did together. JA NEVER missed a beat! If a "heat of the moment" type killing happened like JA claims, then she would have taken that camera -and the pictures contained inside of it- with her as her sick little trophies, a last momento of TA, so to speak. We're talking about a woman who took photos of underwear that she probably had made up herself - just because it had TA's name on it/them, a woman who kept daily journal entries detailing every single instance that she spoke to TA (and her delusional interpretations to what those conversations entailed), and a woman who -up until that point- took and KEPT photos of every single thing that they did together.... So why would she get rid of the camera that had images contained in it of her last memories with TA? Being as conniving as JA is and considering how well she was able to hide both murder weapons so that no one has been able to find them, she could have took the camera and hid it until years down the road when she had gotten away with TA's murder long enough that she felt comfortable going and retrieving the camera from it's hiding place in order to have/view/look at her sick momento pics and relieve the power she felt on the day of those pics. I think that she never viewed those pics -the pics on 6/4- as she did all the other pics that she took of her and TA. All she viewed the pics that were taken on 6/4 (that were on TA's camera) as were that they were nothing more than a tool to help aid her in doing what she did (murder TA) and she promptly discarded the evidence that was created in doing so (w/o a thought at all) and just for good measure threw it in the wash machine/cycle -with a bunch of bleach- and went on her merry sick way. Again, JMO.